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Contribution à l'évaluation d'architectures en Ingénierie Système : application en conception de systèmes mécatroniques

Mambaye Lo 1
1 ISOE-LGI2P - Interoperable System & Organization Engineering
LGI2P - Laboratoire de Génie Informatique et Ingénierie de Production
Abstract : The design step of a complex system is crucial. This observation is particularly true, when considering mechatronic, multi-technological systems, which require a multidisciplinary and collaborative approach. Our work is based on the System Engineering (SE) framework, which focuses on the needs and requirements definition, the conceptual design, and the definition of functional and organic architectures of a system. For this purpose, SE promotes some concepts, processes, and an approach currently widely practiced in the Industry, and even standardized while being a much studied research topic. More precisely, we are interested in a so-called support process of SE, the evaluation process. We are focusing on the effectiveness evaluation and then on the comparison of different functional and organic architecture solutions of a mechatronic system, which emerge invariably from the design. The goal of this process in guiding and helping to choose a solution among candidate architectures, often incomplete or immature in preliminary design, allows maximizing the satisfaction of the systems' stakeholders needs. However, the implementation of this evaluation faces to many difficulties. The consensual and unified vision of data, information, knowledge, and evaluation activities, above specialized engineering teams involved in the design, is still limited. Indeed, the lack of this common vision limits the objective and shared evaluation of a given solution. This is a first problem that we are addressing in our work. To contribute to this common vision, a conceptual model of evaluation data in SE is proposed. Subsequently, the estimation of the choices made all along such an iterative design, and which therefore proceeds by small steps, the management of multiple objectives sometimes contradictory and the consideration of the uncertainty inherent to design are classic problems in design. This constitutes the main problem which our work is answering. The estimation of the consequences of design choices on the system performance is first addressed by a formalization of traceability links between the requirements, functions, and components of the design. This formalization is prior to the detection and correction of inconsistencies of traceability links, in order to automatically identify potential impacts of the architectures' elements choices on different satisfaction criteria of the System Of Interest (SOI). An articulation between the SOI behavioral models and decision models is afterwards proposed for aggregating the satisfaction level of the design objectives, and then ensure the management of multiple and even contradictory objectives of the designers. Qualitative evaluation techniques are finally proposed for sorting the alternative design solutions according to their satisfaction level while considering the increasing maturity level but uncertain of the solution. Lastly, we often denote the lack of integrated environment for modeling the system and proceeding to the analyses and evaluations. The two above synthesized contributions have been integrated into a SE framework, offering a continuum between design activities and evaluation ones. The result is thereby a methodological and tooled guide for mechatronic systems evaluation during design.
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Mambaye Lo. Contribution à l'évaluation d'architectures en Ingénierie Système : application en conception de systèmes mécatroniques. Sciences de l'ingénieur [physics]. Université Montpellier II - Sciences et Techniques du Languedoc, 2013. Français. ⟨tel-00918890⟩

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